Could not complete SSL

on our setup the server is running on nrpe V 2.15 and the client is running on V 3.1.0.

on my server
./check_nrpe -H client_ip -n -u -t 30 -c check_load
CHECK_NRPE: Error receiving data from daemon.

with Error: Could not complete SSL handshake with : 1

but i get a valid result when i remove the -n.

is it possible to not to remove the -n and still get a valid result?